Thursday, January 1, 2015

Find all real numbers that satisfy the equation. cos 2x = sqrt(3)/2


cos%282x%29++=sqrt+%283%29%2F2+

arccos%28cos%282x%29%29++=arccos%28sqrt+%283%29%2F2+%29

2x=pi%2F6%2B2%2Api%2An
or
2x=%2811%2Api%29%2F6%2B2%2Api%2An

where n is an integer, then...
x=%2811%2Api%29%2F12%2Bpi%2An


x=pi%2F12%2Bpi%2An
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